Clevis.



G. H. JOHN$ON. GLBVIS.

APPLICATION FILED .TAN.26,1910.

Patented May 17; 1910.

N R W W U G WITNESSES:

momma f Lunar a GMHAM $0., mogo-uuocankiis W SW GUSTAF HERMAN JOHNSON,OF OIMARRON, TERRITORY OF NEW MEXICO.

CLEVIS.

Specification of Letters Patent.

Application filed January 26, 1910.

Patented May 1'7, 1910.

Serial No. 540,125.

To all whom it may concern:

Be it known that I, GUsrAr H. JOHNSON, a citizen of the United States,and a resident of Cimarron, in the county of Colfax and Territory of NewMexico, have invented certain Improvements in Clevises, of which thefollowing is a specification.

My invention is an improvement in the construction of the ordinaryU-shaped clevis used on plows, cultivators, and harrows for theattachment of draft appliances.

The novelty is embodied in two features as hereinafter described,whereby certain advantages are attained.

In the accompanying drawing :-Figure 1 is a perspective View of theinvention. Fig. 2 is mainly a plan view, a portion being broken away toshow interior construction. Fig. 3 is a section on the line 3-3 of Fig.2.

The U-shaped body 1 of the clevis is provided at its ends withtransverse holes to receive the bolt 2. The head 2 of the latter is fiaton one side, which abuts a corresponding shoulder 8 on the clevis, sothat, when the bolt is inserted in place, it is prevented from rotating.The other end of the bolt has a transverse groove, or open slot, 4, asshown in Fig. 2, which groove receives a fastening device 5, when thebolt is in place, as shown in Figs. 1 and 3. The said fastening deviceis in the nature of a sliding bar having one end broadened so as toprovide a cam-like projection 5 It is arranged in a slot formed in theclevis adjacent to and communicating with the opening which receives thegrooved end of the bolt. Its round shank is encircled by a spiral spring6, which bears upward against the head of the device, as shown in Fig.3, the lower end of the spring being seated on a shoulder at the lowerend of the socket in which the spring rests. It will now be understoodthat, when the bolt is inserted in place, as shown in Figs. 1, 3, thebroadened portion 5 of the fastening device enters or engages the groove4 in the bolt, as shown in Fig. 3, whereby the bolt is held securely inplace. The fastening device is obviously held in such position by thetension of the spring. If it be desired to release the bolt, pressure isapplied to the head of the device, whereby the spring is compressed andthe cam-like portion of the device is forced down out of the groove inthe bolt and below the body 01f 1the same, which leaves the bolt free tos it e.

The aforesaid shoulder 3 of the clevis which the head 2 of the boltabuts when in place, is sloped on the side nearest the body of theclevis, and the head of the bolt is flush with the same, as plainlyshown in Fig. 2. By this construction, the head of the bolt is preventedfrom contact with other objects, which is very objectionable in clevisesof the ordinary construction. The engagement of the shoulder with thehead of the bolt likewise prevents its rotation, so that the groove inthe bolt is always held in position for engagement with the fasteningdevice. By use of the latter, I dispense with the thread and nutordinarily employed as a means for securing the bolt detachably to theclevis, and, the bolt being made shorter, its end is flush with the sideof the clevis so that a smooth surface is presented at that point, whichis a very desirable feature.

In order to protect the head of the fastening device from contact withother objects, it may be arranged in a socket, so that, when in lockingposition, as shown in Figs. 1, 3, the head does not project above theclevis.

What I claim is 1. The improved Ushaped clevis having one of its legsprovided with a shoulder and the other with a transverse slot, a bolthaving a head adapted to engage said shoulder and its other end providedwith a groove, and a fastening device mounted in said slot and adaptedto engage the groove for holding the bolt detachably, substantially asdescribed.

2. A clevis comprising a U-shaped body having one of its apertured endsprovided with a transverse slot, a bolt 'having a transverse grooveadapted, when the bolt is in place, to register with the said slot inthe .device, whereby the latter is held normally locked with the bolt,but may be released therefrom by pressure applied to its head,substantially as described.

GUSTAF HERMAN JOHNSON.

Witnesses:

ANNA EGNELL. C. J. LODGE.

